I was running a game, which started fine but the last month was just hell. Roleplaying games are supposed to be fun, right? My group was doing the same things it sounds like...showing up late when they know what time to meet, playing later than we wanted to to try to get in as much gaming as possible...players talking about other things more and more during the game, disrupting it (especially during combat) and ruining the flow of the game...so I decided that I wanted to take a break, and we all agreed on two weeks.
Three weeks later, they decided that they started a game without me, didn't ask if I wanted to play, and told me to, pardon the expression, f**k off (I know cussing isn't really allowed, but in this case there is no other way to say what happened). Needless to say, why they did this, they never explained.